Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 9/4 and 21/20

1st number: 2 1/4, 2nd number: 1 1/20

9/4 + 21/20 is 33/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 20 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 4 × 5 = 20,
    9/4 = 9 × 5/4 × 5 = 45/20
  3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
    21/20 = 21 × 1/20 × 1 = 21/20
  4. Add the two like fractions:
    45/20 + 21/20 = 45 + 21/20 = 66/20
  5. 66/20 simplified gives 33/10
  6. So, 9/4 + 21/20 = 33/10
    In mixed form: 33/10

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related:

© everydaycalculation.com